7 * added TraceableEventDispatcherInterface
8 * added ContainerAwareEventDispatcher
9 * added a reference to the EventDispatcher on the Event
10 * added a reference to the Event name on the event
11 * added fluid interface to the dispatch() method which now returns the Event
13 * added GenericEvent event class
14 * added the possibility for subscribers to subscribe several times for the
16 * added ImmutableEventDispatcher